Question

If angleABD=70°, angleADB=30°, then find angleBCD

Answer 1

Some of all 3 angles of triangle is 180°
So, angle ABD+Angle ADB+ Angle BCD = 180°
So, 70° +30°+ angle BCD = 180°
Therefore Angle BCD = 80°

Answer 2

180-70-30=180-100=80 so angle BCD=80° THANK YOU